arc
1.N-COUNT 可数名词弧形；弧线 An arc is a smoothly curving line or movement.
The Aleutian chain is a long arc of islands in the North Pacific.
阿留申群岛是北太平洋上一长串呈弧形排列的小岛。
2.N-COUNT 可数名词弧 In geometry, an arc is a part of the line that forms the outside of a circle.
【FIELD标签】：TECHNICAL 术语
3.VERB 动词成弧线；呈弧形 If something arcs in a particular direction, it makes a smoothly curving line or movement.
【语法信息】：V prep/adv
【STYLE标签】：LITERARY 文
A rainbow arced gracefully over the town.
彩虹在小城上空画出了一道优美的弧线。
